Sony has taken today a decision to stop the update for the Xperia M, L, SP. This means that the phones will not be running Android KitKat and will remain as :
Xperia SP and Xperia M will depend upon the issuance of jelly between 4.3 and Xperia L will also depend upon 4.2 Jelly Bean.
Xperia SP and Xperia M will depend upon the issuance of jelly between 4.3 and Xperia L will also depend upon 4.2 Jelly Bean.
The three phones carry a dual core processor and RAM capacity of 1 GB, and can obtain a copy of the Kit Kat devices through the site Cyanogenmod.